Which Great Lake is experiencing the highest levels of invasive plant growth due to phosphorus pollution?
Topic: The Rivers and Waterways of the United States
Which explorer was one of the first Europeans to sail across Lake Michigan?
In what year was the St. Lawrence Seaway opened, allowing ships to access the Great Lakes?
Which city is located on the shore of Lake Michigan?
Lake Michigan is connected to which other Great Lake?
Which of the following is not a major tributary of Lake Michigan?
Which state does NOT border Lake Superior?
Which invasive plant species threatens the ecosystems of the Mississippi River?
What is the average depth of Lake Superior?
What term is used to describe the boundary where fresh and saltwater mix in the lower Mississippi River?
Which city is located on the western shore of Lake Superior?
Which of the following is a significant environmental challenge facing the Mississippi River?
Which of the following is the largest island in Lake Superior?
Which U.S. National Scenic Byway follows the Mississippi River for 3,000 miles?
Which of the following is NOT one of the Great Lakes?
Which Great Lake is the largest by surface area?
Which of the following states borders Lake Erie?
Which is the smallest of the Great Lakes by surface area?
Lake Michigan is unique among the Great Lakes because it is entirely located within which country?
Which river flows into Lake Ontario?
Which is the deepest of the Great Lakes?
Which state is bordered by all five of the Great Lakes?